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+<!DOCTYPE HTML>
+<html>
+<meta charset="utf-8">
+<head>
+ <title>Test MediaElementAudioSourceNode before "loadedmetadata"</title>
+ <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+
+var video = document.createElement("video");
+function test() {
+ video.src = "audiovideo.mp4";
+
+ var context = new AudioContext();
+ var complete = false;
+
+ video.onended = () => {
+ if (complete) {
+ return;
+ }
+
+ complete = true;
+ ok(false, "Video ended without any samples seen");
+ SimpleTest.finish();
+ };
+
+ video.ontimeupdate = () => {
+ info("Timeupdate: " + video.currentTime);
+ };
+
+ var node = context.createMediaElementSource(video);
+ var sp = context.createScriptProcessor(2048, 1);
+ node.connect(sp);
+
+ // This test ensures we receive some nonzero samples when we capture to
+ // WebAudio before "loadedmetadata".
+ sp.onaudioprocess = e => {
+ if (complete) {
+ return;
+ }
+
+ var buf = e.inputBuffer.getChannelData(0);
+ for (var i = 0; i < buf.length; ++i) {
+ if (buf[i] != 0) {
+ complete = true;
+ ok(true, "Got non-zero samples");
+ SimpleTest.finish();
+ return;
+ }
+ }
+ };
+
+ video.play();
+}
+
+if (video.canPlayType("video/mp4")) {
+ test();
+} else {
+ ok(true, "MP4 not supported. Skipping.");
+ SimpleTest.finish();
+}
+
+</script>
+</pre>
+</body>
+</html>